Dr Lim has a keen interest in Minimally Invasive Cardiac Surgery and introduced the Endo Radial harvesting procedure using harmonic scalpel technology at NHC. He also trained the junior staff in Endo Vein harvest procedures. He performs Minimally Invasive Direct Coronary Artery Bypass (MIDCAB) via the chest wall without cutting through any bone. He performs Hybrid Coronary Revascularisation ( a combination of surgical bypass and percutaneous stenting) with Interventional Cardiologists. Dr Lim is a member of the International Society of Minimally Invasive Cardiothoracic Surgery (ISMICS).

In 2000, Dr Lim was a member of the surgical team that performed Singapore’s first Lung Transplant. He was also part of the surgical team that carried out Singapore’s first combined Heart and Liver Transplant in 2011. He was appointed Director , Cardiac Operating Theatre, NHC in 2012. Through a grant from the Ministry of Health, Singapore, he established the National Cardiovascular Homograft Bank in 2008 at the National Heart Centre(NHC) with his colleagues and serves as its Medical Director. In 2011, the National Cardiovascular Homograft Bank became the first Tissue Bank outside North America to obtain the American Association of Tissue Bank(AATB) accreditation. He is a member of the AATB. Dr Lim is one of the only 2 doctors in Singapore who holds the Certified Tissue Banking Specialists (CTBS) Diploma from AATB.